
import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class jdbcDemo4 {
    public static void main(String[] args) throws SQLException {
        //1.创建数据源
        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource)dataSource).setUrl("jdbc:mysql://127.0.0.1:3306/java111?charaterEncodingutf8&useSSL=false");
        ((MysqlDataSource)dataSource).setUser("root");
        ((MysqlDataSource)dataSource).setPassword("123456");
        //2.和数据库服务器创建连接
        Connection connection = dataSource.getConnection();
        //3.构造SQL语句
        String sql = "select * from student";
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        //4.执行SQL
        ResultSet resultSet = preparedStatement.executeQuery();
        //5.遍历结果集合
        while(resultSet.next()) {
            int id = resultSet.getInt("id");
            String name = resultSet.getString("name");
            System.out.println("id = " + id + " ,name = " + name);
        }
        //6.关闭资源
        resultSet.close();
        preparedStatement.close();
        connection.close();
    }
}
